西南交通大学学报 2012, 47(3) 413-419 DOI:   10.3969/j.issn.0258-2724.2012.03.010  ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
绝缘子
积污
流体力学
来流速度
湍流
粘附力
本文作者相关文章
孙继星
高国强
吴广宁
崔易
王波
PubMed
Article by Xun,J.X
Article by Gao,G.J
Article by Wu,A.N
Article by Cui,y
Article by Yu,b

强风环境下棒形绝缘子积污动态仿真分析

孙继星, 吴广宁, 陈维荣, 高国强, 崔易, 王波

西南交通大学电气工程学院, 四川 成都 610031

摘要

为探讨高速铁路绝缘子表面的积污特性,分析了污秽颗粒在强气流环境中的受力情况,建立了QBJ-25/20型绝缘子积污的仿真模型.以绝缘子伞裙表面污秽的体积分数反映其积污状况,得到了绝缘子伞裙上、下表面积污与风速及来流角度之间的关系.结果表明:在高速气流中,绝缘子表面积污量与来流角度、气流速度呈负指数关系;当来流角度在0°~90°之间时,伞裙上表面受来流角度的影响较大,而下表面受气流速度的影响更明显;积污量随污秽颗粒直径增大呈先增大后减小的趋势.

关键词 绝缘子   积污   流体力学   来流速度   湍流   粘附力  

Dynamic Simulation Analysis of Bar Insulator Pollution in Strong Wind

SUN Jixing, WU Guangning, CHEN Weirong, GAO Guoqiang, CUI Yi, WANG Bo

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China

Abstract:

In order to probe into the pollution characters of the surface of an insulator used in high-speed railway, forces on polluted particles in a strong wind environment were analyzed, and a simulation model for pollution of QBJ-25/20 type bar insulator was established. By taking the pollution volume fraction of insulator shed as the index of pollution measure, the relationships between the volume fraction and wind velocity and wind coming angle were obtained. The research result shows that in a strong wind condition there is a negative exponential relationship between the volume fraction and the coming angle, and there exists the same rerelationship between the volume fraction and the wind velocity. The pollution on the upper surface of the shed is mainly influenced by the coming angle ranging from 0° to 90°, while the pollution on the lower surface of the shed is seriously affected by the wind velocity. With the increase of polluted particles' diameters, the volume fraction shows a trend of first increase and then decrease.

Keywords: insulator   contamination   fluid dynamics   wind velocity   turbulence   adhesive force  
收稿日期 2011-06-22 修回日期  网络版发布日期 2012-05-29 
DOI: 10.3969/j.issn.0258-2724.2012.03.010
基金项目:

铁道部科技研究开发计划项目(2009J007-A)

通讯作者:
作者简介: 孙继星(1984-),男,博士研究生,研究为方向电气设备绝缘评估及状态检修、高压绝缘的电磁模拟与数值仿真, 电话:028-87600944,E-mail:sanyou345@163.com

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